Syntheses, Structures, and Photoluminescence of One-Dimensional Lanthanide Coordination Polymers with 2,4,6-Pyridinetricarboxylic Acid

摘要: Nine one-dimensional (1D) lanthanide(III) coordination polymers with the formulas {[La(pta)(H2O)4]·2H2O}n (1), {[Ln(pta)(H2O)5]·4H2O}n [Ln = Sm (2), Eu (3), Tb (4), Ho (5)], and {[Ln(pta)(H2O)3]·4H2O}n Dy (6), Er (7), Tm (8), Yb (9)] (H3pta 2,4,6-pyridinetricarboxylic acid) have been synthesized by reacting corresponding rare earth salts H3pta at room temperature. The X-ray structure analyses show three kinds of 1D chain structures. Complexes 2−5 6−9 are isostructural, respectively. Complex 1 crystallized in triclinic P1 space group, orthorhombic Pna21 group monoclinic P21/c group. In structures, displays two different modes, there intramolecular π−π stacking interactions between pyridyl ring planes. complexes Sm(III), Eu(III), Tb(III), Dy(III) exhibit characteristic luminescence visible region an excitation 305 ...